To Restore Health: 
While in the game, hit (B) to bring up the menus. 
Use the (L) and (R) triggers to switch to the Stats menu. 
Used the D-pad to select the Health entry. 
Press (BLACK) (WHITE) (BLACK) (BLACK) (BLACK) 
Press and hold (A) until the desired Health level is reached. 

To Restore Magicka:

While in the game, hit (B) to bring up the menus. 
Use the (L) and (R) triggers to switch to the Stats menu. 
Used the D-pad to select the Magicka entry. 
Press (BLACK) (WHITE) (WHITE) (BLACK) (WHITE) 
Press and hold (A) until the desired Magicka level is reached. 

To Restore Fatigue:

While in the game, hit (B) to bring up the menus. 
Use the (L) and (R) triggers to switch to the Stats menu. 
Used the D-pad to select the Fatigue entry. 
Press (BLACK) (BLACK) (WHITE) (WHITE) (BLACK) 
Press and hold (A) until the desired Fatigue level is reached. 

     Using  any code replaces the others, so only one can be active at
a  time.  If  a mistake is made entering a BLACK-WHITE code, start the
cheat  over  at  step  4.  The cheat will remain active as long as you
don't  change  menus  using  the  (L)  and  (R)  triggers. Leaving and
entering  menu  mode does not reset the BLACK-WHITE cheat code, so you
need  only  repeat steps 1, 3 (if necessary), and 5 to repeat the last
cheat.  If  the  (L)  and  (R)  triggers are used to change menus, the
BLACK-WHITE  cheat  code  is  cleared  and  all  steps will have to be
repeated.